Bascule-bridge.



A. H. SGHERZEBIl BASGULE BRIDGE.

A APPLIGATION FILED AUG. 5, 1912. 'y 1,104,318, Patented July 21, 19141.

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BASCULE BRIDGE. l

APPLICATION FILED AUG. 5, 1912.

1,104,318. Patented July 21, 1914 2 SHEETS-SHEET 2.v

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BASCULE-BRIDGE.

Specification of Letters Patent.`

Griginal application iled January 23, 1911, Serial No. 604,015. Divided and this application led August 5, 1912. Serial No. 713,486.

To all :whomit may concern Be it known that I, ALBERT H. SCHERZER,

y a citizen of the United States, and a resident of Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Bascule- Bridges; and I do hereby declare that the following is a full, clear, and exact description' thereof, reference being had to the accompanying drawings, and to the characters of reference marked thereon, which form a part of the specification. 1

This invention relates to improvements in bascule or lift bridges of that kind wherein the bridge is opened and closed by the swinging movement of a movable span or spa-ns in a vertical plane, and the invention consists in the matters hereinafter set forth and more particularly pointed out in the appended claims.

The invention refers more specifically to an improved bearing support or rolling segment for the bridge leaf by which the one end of the leaf is supported and upon which it rolls in thel opening and closing movements of the bridge.

The invention herein shown is a division of my prior application for U. S. Letters Patent, Serial No. 604,015, tiled January esi-d, 1911.

As shown in the drawings ;-Figure 1 is a rside elevation of the shore end of the bridge leaf and ilts supporting piers and approach. Fig. 2 is a side elevation of one of the trusses of the leaf, its supporting segment and counterweight. Fig. 3 is an end view of the bridge with lparts omitted. Fig. 4 is an elevation detail of the curved bearing member of the supporting segment. Fig. 5 is a side elevation of a form of the track on which the rolling segment rolls. Fig. 6 is a section on the line 6 6 of Fig. 2. Fig. 7 is a partial 4side elevation of a deck bridge equipped with my improved supporting segment.

As shown in the drawings 10, 10 designates the shore piers for the bridge leaf or span and 11 designates the bridge approach.

12 designates as a whole the movableleaf of the bridge.

The bridge illustrated in Figs. 1 and 2 is of that kind known as a through bridge it embracing two lateral trusses and a bridge floor 13 supported adj acentl to the. lower chords 14 of the trusses.A The inner er shore end of the bridge leaf is provided with rolling segments 15, 15 which are attached rigidly to and form parts of the trusses of the movable leaf and are adapted to rest and roll on'horizontal girders 16, 16 located on either side of the approach 11 and supported on the piers v-10, 10. The said segments are in the planes of the trusses and constitute the rear or heel ends thereof and support the shore end of the span in all positions of the latter.

Each of the supporting segments 15, is made of a single or integral cast or-pressed steel piece, and comprises a curved bearing member 17 which rests and rolls on the supporting girders 10 and a sector shaped body or web 17 'which is thickened and flanged at its inner side to constitute the strut or compression member 18 of the supporting segment. The said sector shaped body is forined at its upper side with oppositely cxteuding horizontal flanges 19, 19 which constitute means bywhich the supporting segment is lattached to the trnssstructure. .The outer side of the web or sector shaped body is thickened and flanged at 20 to constitute a continuation of the ycurved bearing member 17 of the supporting segmentto stiifen the body and connect the bearing member with the' attaching flanges 19. The sector shaped web or body portion of the supporting segment is cored out, as indicated at 21 to lighten the same. The vertical strut member 1S of the segment is placed in the truss in vertical alinement with the strut member 22 of the truss, and is attached to the lower end of said strut member 22 by any suitable rigid fastening means. The lower chord 14; and the oblique brace member 2li of the strutare rigidly fastened to cach other and to the foot of the thickened or strut member of the one-piece supporting segment by any suitable attaching means. The attaching flanges 19 of the upper side of the supporting Segment are fastened by bolts 25 to a. horizontal girder -26 which constitutes part of the truss, and which is attached at its :forward end to the strut member 22 and extends rearwardly therefrom, and is braced from said strut member and the upper chord 27 of the truss by means -of an oblique brace member 28. Supported from thegirders 26 of the trusses and the upper chords thereof, and extending between and rigidly connecting the trusses, as herein shown, a -counter- Pateni-ea July ai, 1111-1.

weight box 2) which is weighted to counterbalance the bridge leaf and by which the leaf is countcrbalanced to facilitate the opening and closing move1r.-cnts of the bridge.

The bearing member 17 of the supporting segments and the supporting girders 1G are provided with intcrtitting parts to prevent the displacement of the bridge structure on said girders. As herein shown the girders are sui-mounted by track members 30, which may also be made of cast or pressed steel; The track members are provided with upwardly extending lugs 31, and the bearing members ot the supporting segments are provided with corresponding notches $32 which are adapted to engage over said lues as the segments roll on the track members. rThe said lugs are rounded on their upper ends and the notches are correspondingly flared at their lower sides so as to insure the entrance of said lugs into said notches.

While the lugs are shown on the track and the notches on the segment it will be obvious that the reversal of the arrangement will produce the same results, and further that the detail of the tooth and notch construction between said coacting members may be otherwise varied.

Itv will be observed that the rolling, snpporting segments 15 constitute parts ot the trusses, the iianged or thickened strut members 1S thereof acting with the strut member 22 of the trusses 'to transmit the live and dead loads of the leaf t0 the supporting or track girders 16. ln the construction shown in ,Figs 1 and 2 the entire live and d ad loads of the outer end of the bridge leaf are transmitted through the inner parts or members 18 of the segments, the truss strut members 22 terminating' at the upper sides ot' the segments, Whether the sai'd truss strut members be so terminated or extend to the lower sides of the segments and rigidly attached thereto, said segments act to transmit the whole or part of the said loads to the supporting girders.

In Fig. 7 I have shown the application of my improved onepiece segment to a deck tnidge,^wherein the segments are located wholly below the floor of the leaf The supporting segment 15,shown in F ig. 7, embraces also an integral brace member 34 which corresponds to the separately formed brace member 24 of the truss shown in Fi gs.

1. and 2.

An advantage of the one piece supportingr segments upon which the shorevvard end ot the bridge leaf rests and rolls lies inthe great simplicity of the construction as comparedjvith rolling segments which are made up otl plates and flanged bars that are riveted together. The improved construction described saves the time and expense oi assembling the plates and bars heretofore employed, and punching and riveting the assembled parts together. Furthermore the load transmitted through the rolling ments herein shown is transmitted without likelihood or danger ot internal shearing stresses such as occur in thebuilt-up plate and bar construction. There is avoided the danger there-tore ot injury to the segments by unequal or non-uniform loading.

lt will be understood that the structural details ot the several features of the invention are capable of variation within the scope and spirit ot the invention, and may thus be varied to adapt the same to bridges of varying constructions. For instance, the interfitting parts of the segment and track girders 16, may be reversed with the projections on the segments and the notches in the members S() of the track girders and the. said intertitting parts may be differently arranged and shaped.

I claim as my invention 1. A bascule bridge provided with a one piece rolling and siiipporting segment which constitutes a component part of and is iXed rigidly to the bridge truss at the heel end of the truss to support the weight of the shore end ot the truss in all positions of the latter, embracing a web thickened at its lower side to provide a curved bearing memlcr, and ianged at one ot' its sides to constitute a strut or compression member and tlangcd also at another side to constitute an attaching member by which the segment is rigidly attached to the truss.

2. In a bascule bridge, the combination with a bridge leaf truss, ofz a one-piece rolling segment, embracing a web flanged at its lower side to constitute a curved bearing member and ii'anged at its'inner side, to constitute a strut or compression member, the truss having a strut member arralnged end to end and in line with the strut member of said segment, with means for rigidly fastening the segment in the truss structure, whereby the segment constitutes a component part of the truss structure.

3. In a bascule bridge, the combination with bridge leaf trusses, of rolling segments at andl constituting the heel ends of the trusses and adapted to support the weight of the shore end of the ieat in all positions ot' the latter, each of said segments embracing a web arranged in the plane of its truss and flanged at its lower edge to constitute a curved bearing member and ianged at its inner side to constitute a strut or compression member, the truss having a strut member arranged end to end and in' line with the strut member of said segment, with means to tixediy fasten the segment in the truss structure.

4. In a bascule lbridge, the combination with `a leat truss comprising upper and lower chords, with a strut member extending downwardly 'from the upper chord and terminating above the lower chord, and with a horizontal girder extending rearwardly from said strut member, of a onepiecerolling and supporting segment comprising a web thickened at its lower side to constitute a curved bearing member, and thickened at its inner side to constitute a strut member which is arranged end to end and in line with the shorter strut member 10 of the tru, and beingalso flanged to-provide' a horizontal attaching member, lwith means to rigidly attach it to said girder.

In testimony, that I climthe foregoing as my invention I affix my signature in the presence of two Witnesses, this 23rd day of l5 July, 1912. l

ALBERT H. SCHERZER. Witnesses: Y

W. L. HALL, HARRY S. GAITHER. 

